I think this old chair is falling apart.

我觉得这把旧椅子要散架了。

The deal fell apart when we failed to agree on a price.

我们在价格上未能达成一致，生意没做成。

I don’t want to have nothing else to fall back on when I can’t model any more.

我不想当自己不能再做模特时没有其他东西可依靠。

When some students fell behind, others would come and offer help.

当有些同学落后时，其他的同学就会主动来帮忙。

You must watch your step so as not to fall down.

你必须留心脚下以免跌倒。

More buildings fell down in the earthquake.

更多的建筑物在地震中倒塌。

That’s where the theory falls down.

这就是该理论的不足之处。

A friend of mine went to Yunnan and fell for a Dai woman.

我有个朋友去云南时爱上了一位傣族女子。

We must not fall for this kind of trick!

我们绝不能轻信这种小把戏而上当啊！

When you are learning to ride a bicycle, you often fall off.

学骑自行车时，经常会摔下来。

The old couple’s hair was falling out.

这对老夫妇的头发在脱落。

I rushed for the door and fell over the cat in the hallway.

我向门口冲去，在过道被猫绊了一跤。

The hunter fired and the deer fell over dead.

猎人一开枪，鹿应声倒下，死了。